Zstory has continually strived to evolve the manifold to fulfill modern-day customer demands and had made it from 201 (austenitic) 1.25mm stainless-steel for its own protection and longevity. With less pipe welds and a thicker flange specifically trimmed to fit all heads and blocks, it allows for matched porting with improved-flow cylinder heads.
The 6-2 configuration is generally accepted as being the most suitable for the widest range of engine applications. Zstory has further developed that conception with the 2-1 merging as far back as possible before the first silencer.
